Understanding international law and treaties is crucial for students studying law as an optional subject. It provides a comprehensive knowledge of the legal framework that governs relations between nations and helps in developing a deeper understanding of various legal concepts and principles. Here are some effective ways to improve understanding of international law and treaties:

1. Study Relevant Textbooks and Materials:
- Start by referring to standard textbooks on international law and treaties. Some recommended options include Oppenheim's International Law, Brownlie's Principles of Public International Law, and Shaw's International Law.
- Make use of online resources such as EduRev, which offers a wide range of study materials, lecture notes, and practice questions on international law.

2. Attend Lectures and Seminars:
- Participate in lectures and seminars conducted by renowned experts in the field of international law. These events provide valuable insights, clarify complex concepts, and offer opportunities for discussion and debate.
- Check if there are any online webinars or conferences on international law that you can attend to enhance your understanding.

3. Join Study Groups and Discussion Forums:
- Join study groups or discussion forums where you can interact with fellow students, professionals, and experts in the field of international law. This allows for collaborative learning, sharing of knowledge, and gaining different perspectives on various legal issues.

4. Follow International Court Cases:
- Stay updated with international court cases, judgments, and legal disputes that involve international law and treaties. Analyze the arguments presented, the legal principles applied, and the outcomes of these cases. This helps in understanding the practical application of international law.

5. Analyze Treaties and International Agreements:
- Read and critically analyze treaties and international agreements. Pay attention to the objectives, obligations, and provisions contained in these documents. Understand the process of treaty-making, negotiation, and implementation.

6. Engage in Moot Court Competitions:
- Participate in moot court competitions that focus on international law. This gives you an opportunity to apply legal principles, argue cases, and develop a practical understanding of international law in a simulated courtroom environment.

7. Stay Updated with Current Affairs:
- Read newspapers, international journals, and online publications to stay updated with current affairs, global events, and legal developments that impact international law. This helps in understanding the evolving nature of international law and its application in contemporary issues.

In conclusion, improving understanding of international law and treaties requires a combination of studying relevant textbooks, attending lectures and seminars, participating in discussions, analyzing court cases and treaties, engaging in moot court competitions, and staying updated with current affairs. By following these steps, students can enhance their knowledge and comprehension of international law and treaties, which will be beneficial for their law optional subject.